#box{
  width: 200px;
  height: 100px;
  background-color: red;
  color: purple;
  /* 测试兼容 */
  backface-visibility: hidden;
}

#img1{
  width: 200px;
  height: 80px;
  background-image: url("./bg_sign.png");
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

#img2{
  width: 200px;
  height: 80px;
  background-image: url("./apple.jpeg");
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

#img3{
  width: 200px;
  height: 80px;
  background-image: url("./mofi.gif");
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

